Grease gun



Jan. 26 1926.

1,571,028 J. w. THOMAS VIGREASE GUN Filed May 21 1925 Patented Jan. 26, UNITED STATES JOSEPH THOMAS, OF NEW YORK, N. Y.

GREASE Gun.

Application filed May 21, 1925. Serial No. 31,733.

To (1. whom it may concern:

Be it known that I, JOSEPH W. THoMAs, a citizen of the United States, and resident of New York, in the county of New York and State of New York, have. invented oertain new and useful Improvements in Grease Guns, of which the following is a specification.

This invention relates'togrease guns or other similar apparatus adapted for the de-' livery of lubricant or other semi-liquid or plastic niaterial underpressure to the point of use. It relates more particularly to that type in which the container'for' the shipment or storage ofthe material, is employed in whole or in part, in connection with the grease gun parts during the delivery of the contents of said container.

In my improved construction the grease gun per se includes a cylinder of such diameter that it may be forced into the barrel or body portion of a cylindrical container or can and substantially snugly fit the interior thereof. As'on improved feature, I make this cylinder longer than the container so that when the caps or closures for the ends of the barrel or body of'the container are removed, the cylinder may be forced through the container body and project from both ends thereof. The cylinder has an end wall which carries a plunger screw or piston rod while the other end wall is removable and has the delivery outlet. Both of these end walls are directly connected to the. cylinder so that the barrel or body of the container may form a jacket for the cylinder of the grease gun and will be held in place against both longitudinal and rotary movement in respect to the cylinder during the dispensing of the material. the container will indicate the-material with which the grease gun is loaded, and, as a new jacket of this kind is placed on the grease gun cylinder for each charge of the latter, the exteriorpf the grease gun, may be kept clean and free from grease and with less likelihood of soiling the hands.

In the accompanying drawings,

Figure 1 is a perspective view of a container adapted for use with my improved grease gun, v

Figure 2 is a perspective View showing the position of the parts during the loading or charging of the grease gun,

Figure 3 is a central longitudinal section of the grease gun,

The label or name on' Figure 4 is an end view of the grease gun with the outlet cap removed, and V Figure 5 is a side elevation, partly in section, of a modified form of connection between the end wall and piston rod,

My improved grease gun is adapted for use in connection with a container or can shown particularly in Figure 1, and which includes a barrel or body portion 10 and-a pair of removable end walls or caps 12 and 13. The body portion has a head which may form a stop for the edge of the flan e of the top cap 12, said bead being preferab y formed of separate sections 14. The container may be made of sheet metal or of any other desired material such, for instance, as cardboard or the like, depending upon the nature of the material stored therein.

The rease gun includes a cylinder 15 of an exterior diameter but slightly less than that of the interior diameter of the conto be shipped and tainer body 10, of a length somewhat greater than said bodyv so that the cylinder may be forced into the container, upon the removal of the caps from the latter, and will project from both ends of said body.

The cylinder has a top end wall 16 which may be lnthe form of a cap threaded, welded or otherwise secured thereto or in some instances, it may be made-integral there-- with. This top wall 16 has a center opening through which extendsthe piston rod 17 of a 1 l'nston 18. The piston rod is preferably t readed and engages with a collar 19 which is detachably secured; to the end.

wall 16. It may have threaded engagement with a boss 20 as shown in Figures 2 and 3,

or it may have a bayonet slot 21 for engagement with a pin 22 on a similar boss 20 as shown in Figure 5. By detaching the collar 19 from the end wall the piston rod may freely slide through the end wall but when the collar is attached, said piston rod can be moved endwise only upon rotating it to screw it throughthe collar.

The cylinder at its opposite end, is provided with a removable end wallor cap 23 which has the dispensing outlet 24:. This outlet may deliver to a nozzle, a flexible hose or anyother suitable means for conveying the grease or other contents to the point of use. the wall 16, is provided with means for engaging with the body of the container to prevent relative rotation of the latter on the One of the end walls as for instance,

cylinder when said body is in place as a jacket on the c linder. As shown, the cap 16 has a depen ing the upper end of the jacket may extend and this flange has recesses beads 14: on the acket or container body 10. The lower cap or end wall 23 has a flange 27 which may project over and conceal the lower end of the-jacket or body wall 10. I

In charging the grease gun, the top cap 12 is removed from the container and the end of the cylinder is forced into the container. By holding the container in one end'and by pressing down and rotatingthe handle-28 qf the piston rod, the piston will be screwed up into the cylinder and at the same time the cylinder will be forced down into the container. When tomof the container and all of the grease has been'forced into the cylinder, the lower cap 13 on the container may be removed and the body portion thereof forced to effect mterlocking engagement of the bead sections 14 and the recesses 26. The lower end wall 23 of the grease-gun may then'be screwed directly onto' the lower end of the cylinder to, hold the container body in place on the cylinder. Thus the container body may remain on the cylinder during the use of the contents of the container so as to form a jacket for the grease gun which Wlll indicate the contents of the grease gun and W111 present a clean and fresh surface each time the rease gun is reloaded. If the material to e dispensed by the device is of very low viscosity, it may be ejected by unscrewing,

the collar 19 and forcing the plunger down by direct endwise movement of the piston rod. If the material is of a more viscous nature orrequiring more force to eject it, or to force it to the. point of use, the collar may be secured in place and the piston rod rotated to move the piston or plunger downwardly at a slower. and more easily controlled rate.

Having thus described my invention what I claim as new, and desire to secure by Letters Patent is :j- 1. A device for dispensing the contents of a-cylindrical container having removable end walls, said device. including a cylinderadapted to beprojected axially throu h the body of the container and to closely t the latterwith both ends of said cylinder-projecting beyond the ends of said body, and a pair of end walls, one having a dispensing outlet, a piston having aiston rod projecting through the other en Well, one of said end walls being removable and said end walls having means for enga ing the end portions ofthe container upon t e Outside of said cylflange 25 beneath which 26 for receiving thethe cylinder reaches the botinder and prevent relative rotation of the cylinder and container.

2. A grease gun including acylinder, a pair of end walls each having a flange encircling said cylinder with'the edge portion spaced therefrom, one of said end walls being removable whereby a jacket may he slipped onto said cylinder and held between and beneath aid flanges, a piston having a rod projecting through one of said end walls. the other of said end walls having a dispensing outlet.

j In combination, a container for plastic material including a cylindrical body portion and a pair of removable end caps, said body portion having a bead adjacent to one end and formed of spaced sections, a cylinder adapted to be projected through the body of I and a container having a cylindrical body portion adapted to be slipped end-wise onto said cylinder upon the transfer of the material from said container to said cylinder, and said bodyportion being adapted to serve as a jacket on'said cylinder during the dispensing of material from the latter, said 'end walls engaging with said jacket to prevent relative axial or rotational movement of the jacket and c linder. 5. A grease gun including a cylinder having a pair of end walls,'-.each having an aperture therethrough, one of said apertures serving as a dlspensing outlet and the other to receive a piston rod, 9. piston within said cylinder having a threaded piston rod, a cap detachablys'ecuredtc said second mentioned end wall and having threaded engagement with said piston rod, said first mentioned end wall being detachable from said cylinder and having threaded engagement therewith and said end walls-having means for engaging with the ends of the body portion of a container upon the slipping of the latter onto said cylinder, and the transfer of the contents of the container to the cylinder.

Signed at New York city in the county of New York and State of New York this 19th day of May A. D. 1925.

- JOSEPH W. THOMAS. 

